1021322513145 has 32 divisors (see below), whose sum is σ = 1789107742080. Its totient is φ = 493398973440.

The previous prime is 1021322513143. The next prime is 1021322513173. The reversal of 1021322513145 is 5413152231201.

It is a happy number.

It is not a de Polignac number, because 1021322513145 - 2¹ = 1021322513143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021322513143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11127280 + ... + 11218689.

It is an arithmetic number, because the mean of its divisors is an integer number (55909616940).

Almost surely, 2^{1021322513145} is an apocalyptic number.

1021322513145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1021322513145 is a deficient number, since it is larger than the sum of its proper divisors (767785228935).

1021322513145 is a wasteful number, since it uses less digits than its factorization.

1021322513145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22346265.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 1021322513145 its reverse (5413152231201), we get a palindrome (6434474744346).

The spelling of 1021322513145 in words is "one trillion, twenty-one billion, three hundred twenty-two million, five hundred thirteen thousand, one hundred forty-five".